1. Breen quoted in Doherty, Th. (2007) Hollywood’s Censor: Joseph I. Breen & The Production Code Administration. New York: Columbia University Press, p. 340.
2. Doherty (2007) Hollywood’s Censor, pp. 340–341.
3. There were different versions of the Code. On the origin and the different versions of the Code, see Gardner, G. (1987) The Censorship Papers. New York: Dodd, Meat & Company, pp. 207–212
4. Leff, L. J. and Simmons, J. (1990) The Dame in the Kimono: Hollywood, Censorship, and the Production Code from the 1920s to the 1960s. New York: Grove Wiedenfeld, pp. 283–286
5. Maltby, R. (1993) The Production Code and the Hays Office, pp. 37–72 in T. Balio (ed) Grand Design: Hollywood as a Modern Business Enterprise, 1930–1939. Berkeley: University of California Press